K8s How to deploy pod 1 per specific node, not all node in cluster

Question

Let say I have a cluster with 10 worker nodes and the application is randomly deployed to them. I have a namespace X, have 20 instances of nodejs that want to connect to MySQL Group Replication via MySQL Router.
I want to deploy 1 instance of MySQL Router to every node that has at least 1 of my nodejs application. Is this logic support with the k8s default rule?
Ex:

• node1: 4 nodejs, 1 router
• node2: 3 nodejs, 1 router
• node3: 12 nodejs, 1 router
• node4: 1 nodejs, 1 router
• other nodes: no app => no router

Answer 1

Using Inter-pod affinity :

this pod should (or, in the case of anti-affinity, should not) run in an X if that X is already running one or more pods that meet rule Y.